linux-kernel - Re: [RFC PATCH] USB:XHCI:Modify XHCI driver for USB2.0 controller

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Message-ID: <87cc8b54-f530-cce0-3ea2-f879436ff5f7@huawei.com>
Date:   Sat, 27 Feb 2021 11:31:00 +0800
From:   liulongfang <liulongfang@...wei.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     <mathias.nyman@...el.com>, <linux-usb@...r.kernel.org>,
        <yisen.zhuang@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] USB:XHCI:Modify XHCI driver for USB2.0 controller

On 2021/2/26 16:38, Greg KH wrote:
> On Fri, Feb 26, 2021 at 04:21:37PM +0800, Longfang Liu wrote:
>> Our current XHCI hardware controller has been customized to only
>> support USB 2.0 ports.
> 
> That sounds like a spec violation, right?  Why do you want to do this?
> 
> greg k-h
> .
> 
I hope to support a USB2.0-only mode on the XHCI controller
through software configuration.
Thanks.
Longfang Liu